深圳市2014年中考预测题(一)
2014年广东省深圳市龙岗区中考模拟考试数学试题及答案

2014年深圳市龙岗区中考模拟考试数学试题第一部分 选择题(本题共12小题,每小题3分,共36分.每小题给出4个选项,其中只有一个是正确的) 1.2014的相反数是( ) A .2014B .2014-C .20141D .20141-2.“辽宁号”航母的满载排水量为67500吨,数据67500用科学记数法表示为( ) A .210675⨯B .21075.6⨯C .41075.6⨯D .51075.6⨯3.下列图形中,既是..轴对称图形又是..中心对称图形的是( )A B C D4.下图是由八个完全相同的小正方体组成的几何体,其主视图是( )正面 A B C D 5.下列计算中,正确..的是( ) A .9132=- B .()332-=-C .326m m m =÷D .()222b a b a -=-6.已知⊙O 1与⊙O 2的半径R 、r 分别是方程01272=+-x x 的两根,且圆心距1=d ,那么⊙O 1与⊙O 2的位置关系是( ) A .外离B .外切C .相交D .内切7.已知一个多边形的每一个内角都等于135°,则这个多边形是( )A .正六边形B .正八边形C .正十边形D .正十二边形D8.下列命题中,错误..的是( ) A .平行四边形的对角线互相平分B .对角线相等的四边形是矩形C .一组对边平行,一组对角相等的四边形是平行四边形D .顺次连接等腰梯形各边中点所得的四边形为菱形9.某中学九(1)班学生为希望工程捐款,该班50名学生的捐款情况统计如图1所示,则他们捐款金额的众数和中位数分别是( ) A .16,15 B .15,16 C .20,10D .10,20图1 图210.如图2,在边长为9的等边△ABC 中,BD =3,∠ADE =60°,则AE 的长为( ) A .6B .7C .7.5D .811.如图3,菱形OABC 的顶点A 在x 轴的正半轴上,顶点C 的坐标为(3,4).反比例函数xky =(x >0)的图象经过顶点B ,则k 的值为( ) A .32 B .24C .20D .12图3 图412.如图4,在Rt ABC △中,︒=∠90C ,6=AC ,8=BC ,⊙O 为ABC △的内切圆,点D 是斜边AB 的中点,则ODA ∠tan 的值为( ) A .2 B C .34D .2第二部分 非选择题填空题(本题共4小题,每小题3分,共12分) 13.分式方程312-=x x 的解为______________. 14.如图5,已知圆锥的底面半径OA =3cm ,高SO =4cm ,则该圆锥的侧面积为 ______________cm 2.15.如图6,交警为提醒广大司机前方道路塌陷在路口设立了警示牌.已知立杆AD 的高度是3m ,从侧面B 点测得警示牌顶端C 点和底端D 点的仰角分别是60°和45°.那么警示牌CD 的高度为______________ m .16.如图7,在平面直角坐标系中,Rt △OAB 的顶点A 在x 轴的正半轴上。
2014年科学中考模拟试卷含答案

2014年科学中考模拟试卷含答案2014年深圳市初中毕业生学业考试科学模拟试卷说明:1.答题前,请将姓名、考生号、考场、试室号和座位号用规定的笔写在答题卡指定的位置上,将条形码粘贴好。
2.全卷分二部分,第一部分为选择题,第二部分为非选择题,共6页。
考试时间120 分钟,满分150分。
3.考生必须在答题卡上按规定作答;凡在试卷、草稿纸上作答的,其答案一律无效。
答题卡必须保持清洁,不能折叠。
4.本卷1~38题为选择题,每小题选出答案后,用2B 铅笔将答题卡选择题答题区内对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案;39~48题为非选择题,答案必须用规定的笔,按作答题目的序号,写在答题卡非选择题答题区内。
5.考试结束,请将本试卷和答题卡一并交回。
6.可能用到的相对原子质量:H-l Na -23 Cl-35.5 O-16 Ca-40 C-12第一部分选择题甲 第15题图 乙AA A .大豆、大蒜、生姜、苹果细胞中都有细胞壁、细胞质和细胞核B .右图中的每一粒豆都是由一个子房发育而成的一个果实C .苹果树结构层次:细胞→组织→器官→整株苹果树D .吃生姜时感觉有一定的辣味,这种性状是由生姜细胞中的基因决定的。
4.乳酸饮料放久后容易产生蛋白质沉淀而使饮料变浑浊,在饮料中加入少量蛋白酶可以分解蛋白质,去除浑浊,加其他种类的酶则无济于事。
这说明( )A.酶的催化作用受环境的影响B.酶的催化作用主要是蛋白质C.酶的催化作用具有高效的特点D.酶的催化作用具有专一的特点5.小明观察血涂片时,首先通过调节看到了图甲所示的物像。
为了进一步看清结构A ,小明又进行一步操作,观察到图乙所示的物像,小明的这一步操作是( ) A .调节反光镜 B .向上移动了载玻片C .转动粗准焦螺旋D .换成高倍镜后再调节细准焦螺旋6.“转基因”,无疑是2014中国“两会”热度最高的话题之一,连日来,中国公众和“两会”代表委员们共同开启了一场关于转基因的问答与讨论。
深圳市2014年中考第一轮模拟考试(一模)英语试题(PDF版,无答案)

深圳市2014年第1轮中考模拟考英语试卷说明:1.答题前,请将姓名、考号、座位号、学校用规定的笔写在答题卡的相应位置上。
2.全卷分两部分,第一部分为选择题,第二部分为非选择题,共10页,考试时间为90分钟,满分85分。
3.本卷试题,考生必须在答题卡上按规定作答。
考试结束,请将答题卡交回。
第一部分选择题(65分)I. 词语释义(5分)从下面每小题的A、B、C、D四个选项中选出可以替换划线部分的最佳选项,并在答题卡上将相应的字母编号涂黑。
(共5小题,每小题1分)1. We’ve been hunting for the missing flight for a long time.A. caring forB. running afterC. looking forD. calling for2. The young man was calm and confident at the interview and as a result, he got the job.A. at all costsB. in additionC. as usualD. because of that3. They saw a star cross the sky in a flash.A. quicklyB. slowlyC. in piecesD. in a way4. Angela raised her hand when she heard the question.A. get upB. put upC. put downD. waved5. The city is beautiful and I lose my heart to it.A. get lost inB. lose hope forC. fall in love withD. learn fromII. 选择填空(15分)从下面每小题的A、B、C、D四个选项中选出可以填入空白处的最佳选项,并在答题卡上将相应的字母编号涂黑。
深圳市2014 年第2轮中考模拟考科学试卷

C.铁加入稀盐酸
D.等质量、等浓度的双氧水分别制取氧气
深圳市 2014 年第 2 轮中考模拟考科学试卷第 3 页(共 12 页)
深圳市 2014 年第 2 轮中考模拟考科学试卷第 4 页(共 12 页)
25. 如图所示,水平传送带上的物体正在向右运动,物体速度逐渐变大,分析物体受到的力有( ) A.重力、传送带的支持力 B.重力、对传送带的压力 C.重力、传送带的支持力、向右的摩擦力 D.重力、传送带的支持力、对传送带的压力 26. 如图所示是使用简单机械匀速提升同一物体的四种方式(不计机械自重和摩擦) ,其中所需动力最小 的是( )
深圳市 2014 年第 2 轮中考模拟考科学试卷第 1 页(共 12 页)
深圳市 2014 年第 2 轮中考模拟考科学试卷第 2 页(共 12 页)
14. 正确的化学实验操作是实验成功的保障,下列实验操作正确的是(
)
A.熄灭酒精灯
B.称量 NaOH 固体
18. 要借助酸碱指示剂才能判断反应进行情况的是( ) A.稀硫酸和氧化铁 B.稀盐酸和氢氧化铜 稀盐酸和氢氧化铜 C.稀盐酸和氢氧化钠溶液 D.硫酸铜溶液和氢氧化钠溶液 硫酸铜溶液和氢氧化钠溶液 19. 2014 年 3 月 1 日起,所有室内工作场所、室内公共场所和公共交通工具内以及部分 室内公共场所和公共交通工具内以及部分 室外场所被列为禁止吸烟场所,香烟产生的烟雾中含有一些尼古丁 香烟产生的烟雾中含有一些尼古丁,氨,一氧化碳 等物质.其中尼古丁的化学式为 C10H14N2,以下判断正确的 以下判断正确的是( ) A.C10H14N2 为一种有机物 B.C10H14N2 中 C、H、N 三种元素的质量比为 10:14 14:2 C.C10H14N2 中氮元素的质量分数为 8.6% D.尼古丁由 C、H、N 原子构成 20. 如图是某反应的微观示意图,下列说法不正确的是( ( ) A.生成物都是化合物 B.生成物的分子个数比为 1:1 C.该反应为复分解反应 D.参加反应的 和 的质量比为 17:24
深圳市2014年中考语文模拟试题(附答案)

深圳市2014年中考模拟考试(附答案)语文试卷班级:__________________ 姓名:__________________ 成绩:__________________第一部分选择题(1—4题)一、本大题共4小题,每题3分,共12分1.请选出下列词语中读音正确的一项()A.襁(qiǎng)褓繁衍(yán)恣睢(suī)味同嚼(jiáo)蜡B.栈(zhàn)桥田(pǔ)圃秕(bì)谷舐(tiǎn)犊之爱C.谮(zhèn)言疱(páo)官脚踝(huaí)怒不可遏(è)D.倒坍(tān)伫(zhù)立两栖(qī)孜(zī)孜不倦2.下列句点中加点词语使用正确的一项是()A.我喊了他半天,他丝毫没有反映..。
B.想不到MP4也可以用来学习英语!他对于自己发现这个不二法门....沾沾自喜。
C.洪水虽然来势汹汹....,但我们的抗洪工程安然无恙。
D.我们应该用辩证的观点去评判历史人物,不能只看一面,断章取义....。
3.句子的排列顺序合理的一项是()①比起事事都凭一己之力的项羽,刘邦更懂得用人之道。
②刘邦比起项羽几乎没有什么优势。
③但他也有出众的地方,就是知人善任和体恤臣民。
④相比力拔山河的项羽,刘邦既没有武勇,又缺乏主张,对平天下的哲学又知之又少。
⑤秦末,刘邦项羽相争。
A.③②①④⑤B.⑤③①②④C.③⑤①④②D.⑤②④①③4.下列说法正确的一项是()A.“老年人尚且坚持锻炼,何况我们年轻人。
”这是一个递进关系复句。
B.“在现代化建设中,我们要充分吸收一切国外的先进经验。
”这个句子没有语病。
C.《智取生辰纲》节选自《水浒传》,该书与“《三国志》、《西游记》、《红楼梦》”并称为我国“四大古典白话小说”。
D.“沉没呵,沉没呵!不在沉默中爆发,就在沉默中灭亡。
”这句话运用了排比的修辞手法。
第二部分非选择题(5—18题)二、本大题共1小题,每空1分,共15分5.请在下面横线上填上相应的句子。
深圳中学2014年中考数学一模试卷(含答案)

深圳中学2014年中考第一次模拟考试数学考生须知:1.本试卷共5页。
全卷满分150分。
考试时间为120分钟。
试题包含选择题和非选择题。
考生答题全部答在答题卡上,答在本试卷上无效。
2.请将自己的姓名、考试证号用0.5毫米黑色墨水签字笔填写在答题卡上。
3.答选择题必须用2B铅笔将答题卡上对应的答案标号涂黑。
如需改动,请用橡皮擦干净后,再选涂其它答案。
答非选择题必须用0.5毫米黑色墨水签字笔写在答题卡的指定位置,在其它位置答题一律无效。
一、选择题(共10小题,每小题3分,共30分.).C D.C D..C D.5.(3分)如图,已知Rt△ABC中,∠C=90°,BC=3,AC=4,则sinA的值为().C D.7.(3分)如图,图1是一个底面为正方形的直棱柱;现将图1切割成图2的几何体,则图2的俯视图是().C D.210.(3分)如图,将边长为a的正六边形A1A2A3A4A5A6在直线l上由图1的位置按顺时针方向向右作无滑动滚动,当A1第一次滚动到图2位置时,顶点A1所经过的路径的长为().C D.二、填空题(共6小题,每小题3分,共18分,请将答案填在答题卡上).11.(3分)因式分解:a2+2a=_________.12.(3分)某市在市中心建了一个文化广场,建成后总面积达163500平方米,成为该市“文化立市”和文化产业大发展的新标志,把163500平方米用科学记数法可表示为_________平方米.13.(3分)如图,等腰梯形ABCD中,AB∥DC,BE∥AD,梯形ABCD的周长为26,DE=4,则△BEC的周长为_________.14.(3分)已知⊙O1与⊙O2的半径分别是方程x2﹣4x+3=0的两根,且圆心距O1O2=t+2,若这两个圆相切,则t=_________.15.(3分)双曲线y1、y2在第一象限的图象如图,,过y1上的任意一点A,作x轴的平行线交y2于B,交y轴于C,若S△AOB=1,则y2的解析式是_________.16.(3分)若a1=1﹣,a2=1﹣,a3=1﹣,…;则a2014的值为_________.(用含m的代数式表示)三、解答题(本大题共9题,满分102分.解答应写出文字说明、证明过程或演算步骤).17.(9分)解不等式组,并把解集在数轴上表示出来.18.(9分)如图,已知:在△ABC中,AB=AC,∠BAF=∠CAE,求证:BE=CF.19.(10分)化简求值:,其中x=2.20.(10分)“初中生骑电动车上学”的现象越来越受到社会的关注,某校利用“五一”假期,随机抽查了本校若干名学生和部分家长对“初中生骑电动车上学”现象的看法,统计整理制作了如下的统计图,请回答下列问题:(1)这次抽查的家长总人数为_________;(2)请补全条形统计图和扇形统计图;(3)从这次接受调查的学生中,随机抽查一个学生恰好抽到持“无所谓”态度的概率是_________.21.(12分)某市为争创全国文明卫生城,2008年市政府对市区绿化工程投入的资金是2000万元,2010年投入的资金是2420万元,且从2008年到2010年,两年间每年投入资金的年平均增长率相同.(1)求该市对市区绿化工程投入资金的年平均增长率;(2)若投入资金的年平均增长率不变,那么该市在2012年需投入多少万元?22.(12分)马航事件牵动了全国甚至全世界人们的心,当得知MH370客机最后失踪地点是在印度洋南部某海域C处,“雪龙”号科考船立即从B处出发以60km/h的速度前往搜救.已知出发时在B 测得搜救指挥基地A的方位角为北偏东80°,测得失踪地点C的方位角为南偏东25°.航行10小时后到达C处,在C处测得A的方位角为北偏东20°.求C到A的距离.23.(12分)如图,AB是⊙O的直径,BC为⊙O的切线,D为⊙O上的一点,CD=CB,延长CD交BA的延长线于点E.(1)求证:CD为⊙O的切线;(2)求证:∠C=2∠DBE;(3)若EA=AO=2,求图中阴影部分的面积.(结果保留π)24.(14分)如图,在四边形ABCD中,AB=AD,CB=CD,E是CD上一点,BE交AC于F,连接DF.(1)证明:∠BAC=∠DAC,∠AFD=∠CFE.(2)若AB∥CD,试证明四边形ABCD是菱形;(3)在(2)的条件下,试确定E点的位置,使得∠EFD=∠BCD,并说明理由.25.(14分)如图,已知抛物线的方程C1:y=﹣(x+2)(x﹣m)(m>0)与x轴相交于点B、C,与y轴相交于点E,且点B在点C的左侧.(1)若抛物线C1过点M(2,2),求实数m的值;(2)在(1)的条件下,求△BCE的面积;(3)在(1)条件下,在抛物线的对称轴上找一点H,使BH+EH最小,并求出点H的坐标;(4)在第四象限内,抛物线C1上是否存在点F,使得以点B、C、F为顶点的三角形与△BCE相似?若存在,求m 的值;若不存在,请说明理由.深圳中学2014年中考第一次模拟试卷数学答案一、选择题(共10小题,每小题3分,共30分.).C D.C D..C D.5.(3分)如图,已知Rt△ABC中,∠C=90°,BC=3,AC=4,则sinA的值为().C D.sinA==7.(3分)如图,图1是一个底面为正方形的直棱柱;现将图1切割成图2的几何体,则图2的俯视图是().C D.210.(3分)如图,将边长为a的正六边形A1A2A3A4A5A6在直线l上由图1的位置按顺时针方向向右作无滑动滚动,当A1第一次滚动到图2位置时,顶点A1所经过的路径的长为().C D.a,C=C=aa a+++l=二、填空题(共6小题,每小题3分,共18分,请将答案填在答题卡上).11.(3分)因式分解:a2+2a=a(a+2).12.(3分)某市在市中心建了一个文化广场,建成后总面积达163500平方米,成为该市“文化立市”和文化产业大发展的新标志,把163500平方米用科学记数法可表示为 1.635×105平方米.13.(3分)如图,等腰梯形ABCD中,AB∥DC,BE∥AD,梯形ABCD的周长为26,DE=4,则△BEC的周长为18.14.(3分)已知⊙O1与⊙O2的半径分别是方程x2﹣4x+3=0的两根,且圆心距O1O2=t+2,若这两个圆相切,则t=2或0.15.(3分)双曲线y1、y2在第一象限的图象如图,,过y1上的任意一点A,作x轴的平行线交y2于B,交y轴于C,若S△AOB=1,则y2的解析式是y2=.解:∵=..16.(3分)若a1=1﹣,a2=1﹣,a3=1﹣,…;则a2014的值为1﹣.(用含m的代数式表示)﹣=1=,=1=m=﹣.三、解答题(本大题共9题,满分102分.解答应写出文字说明、证明过程或演算步骤).17.(9分)解不等式组,并把解集在数轴上表示出来.18.(9分)如图,已知:在△ABC中,AB=AC,∠BAF=∠CAE,求证:BE=CF.19.(10分)化简求值:,其中x=2.20.(10分)“初中生骑电动车上学”的现象越来越受到社会的关注,某校利用“五一”假期,随机抽查了本校若干名学生和部分家长对“初中生骑电动车上学”现象的看法,统计整理制作了如下的统计图,请回答下列问题:(1)这次抽查的家长总人数为100;(2)请补全条形统计图和扇形统计图;(3)从这次接受调查的学生中,随机抽查一个学生恰好抽到持“无所谓”态度的概率是.扇形统计图:赞成:,反对:×=.21.(12分)某市为争创全国文明卫生城,2008年市政府对市区绿化工程投入的资金是2000万元,2010年投入的资金是2420万元,且从2008年到2010年,两年间每年投入资金的年平均增长率相同.(1)求该市对市区绿化工程投入资金的年平均增长率;(2)若投入资金的年平均增长率不变,那么该市在2012年需投入多少万元?22.(12分)马航事件牵动了全国甚至全世界人们的心,当得知MH370客机最后失踪地点是在印度洋南部某海域C处,“雪龙”号科考船立即从B处出发以60km/h的速度前往搜救.已知出发时在B 测得搜救指挥基地A的方位角为北偏东80°,测得失踪地点C的方位角为南偏东25°.航行10小时后到达C处,在C处测得A的方位角为北偏东20°.求C到A的距离.×=300×=100kmCA=300+100=1003)+23.(12分)如图,AB是⊙O的直径,BC为⊙O的切线,D为⊙O上的一点,CD=CB,延长CD交BA的延长线于点E.(1)求证:CD为⊙O的切线;(2)求证:∠C=2∠DBE;(3)若EA=AO=2,求图中阴影部分的面积.(结果保留π)BD=2BF=2××﹣24.(14分)如图,在四边形ABCD中,AB=AD,CB=CD,E是CD上一点,BE交AC于F,连接DF.(1)证明:∠BAC=∠DAC,∠AFD=∠CFE.(2)若AB∥CD,试证明四边形ABCD是菱形;(3)在(2)的条件下,试确定E点的位置,使得∠EFD=∠BCD,并说明理由.25.(14分)如图,已知抛物线的方程C1:y=﹣(x+2)(x﹣m)(m>0)与x轴相交于点B、C,与y轴相交于点E,且点B在点C的左侧.(1)若抛物线C1过点M(2,2),求实数m的值;(2)在(1)的条件下,求△BCE的面积;(3)在(1)条件下,在抛物线的对称轴上找一点H,使BH+EH最小,并求出点H的坐标;(4)在第四象限内,抛物线C1上是否存在点F,使得以点B、C、F为顶点的三角形与△BCE相似?若存在,求m 的值;若不存在,请说明理由.((=,∴)﹣=2(•±+2∴∴((EC=。
2014年初中毕业升学考试(广东深圳卷)答案

绝密★启用前2016-2017学年度???学校4月月考卷试卷副标题注意事项:1.答题前填写好自己的姓名、班级、考号等信息 2.请将答案正确填写在答题卡上第I 卷(选择题)请点击修改第I 卷的文字说明 一、选择题1.下列书写符合要求的是( )A .氧离子O -2B .2个氢原子H 2C .氢氧化镁的化学式Mg(OH)2D .铁离子Fe 2+【答案】C 【解析】试题分析:A 选项是错误的表述,应该为O 2-;B 选项是错误的叙述,应该为2个氢原子2H ;C 选项氢氧化镁的化学式Mg(OH)2 是正确的叙述;D 选项是错误的叙述,应该为铁离子Fe 3+;故选C考点:化学符号的书写2.如图,下列说法正确的是( )A .铱元素的核外电子数是77B .铱元素的相对原子质量是192gC .铱元素的质子数是115D .铱元素不是金属元素 【答案】A 【解析】试题分析:根据原子序数=核电荷数=核外电子数, A 选项铱元素的核外电子数是77是正确的叙述;B 选项是错误的叙述,为铱元素的相对原子质量是192。
0;C 选项是错误的叙述,应为铱元素的质子数是77,中子数为115;D 选项是错误的叙述,铱元素是金属元素 ;故选A考点:元素周期表所提供的信息 3.下列判断正确的是()A .PH<7的雨水叫酸雨B .PH 越小,酸性越弱C .证明溶液里面含有Cl -,只需要加入AgNO 3溶液D .使酚酞试液变红的溶液是碱性溶液 【答案】D试卷第2页,总7页【解析】试题分析:A 、PH<7的雨水叫酸雨是错误的叙述,PH<5.6的雨水叫酸雨 ;B 选项PH 越小,酸性越弱是错误的叙述,应该为PH 越小,酸性越强;C 选项证明溶液里面含有Cl -,只需要加入AgNO 3溶液是错误的叙述,证明溶液里面含有Cl -,需要加入AgNO 3溶液,还要加入稀硝酸;D 选项使酚酞试液变红的溶液是碱性溶液是正确的叙述;故选D 考点:酸雨、酸性强弱、氯离子的检验、碱性溶液的判断 4.下列用途正确的是()A .生石灰可做某些气体的干燥剂B .混合施用硫酸铵和草木灰(碳酸钾的水溶液呈碱性)可增强肥效C .氧气可做火箭燃料D .含磷衣粉粉含有植物生长所需的磷元素,提倡大量使用 【答案】A 【解析】试题分析:A 选项生石灰可做某些气体的干燥剂是正确的叙述;B 选项是错误的叙述,混合施用硫酸铵和草木灰(碳酸钾的水溶液呈碱性)可降低肥效 ;C 选项是错误的叙述,氧气只有助燃性没有可燃性;D 选项 是错误的叙述,含磷衣粉粉含有植物生长所需的磷元素,提倡大量使用会造成水污染;故选A 考点:干燥剂、铵盐的检验、氧气的性质、水污染 5.下列操作正确的是()A .H 2还原氧化铜实验中,反应结束后先停止通入H 2B .稀释浓硫酸实验中,将浓硫酸沿烧杯内壁慢慢加入水中并用玻璃棒不断搅拌C 、固体药物都可以直接放在天平的托盘上称量D .过滤操作中,漏斗下端置于烧杯中央 【答案】B 【解析】试题分析:A 、H 2还原氧化铜实验中,反应结束后先停止通入H 2 是错误的叙述氧气进入装置会氧化炽热的铜;B 选项稀释浓硫酸实验中,将浓硫酸沿烧杯内壁慢慢加入水中并用玻璃棒不断搅拌是正确的叙述;C 选项固体药物都可以直接放在天平的托盘上称量是错误的叙述,容易腐蚀托盘;故选B 考点:基本操作6.如图,下列说法错误的是( )A .一定质量的溶液稀释时加入水质量与溶质质量的变化B .t 10C 时,A 、B 两物质的饱和溶液的溶质质量相等 C .向NaOH 溶液中加盐酸时,溶液PH 的变化D .用AB 两份等质量等浓度的双氧水制取氧气,A 中加入了二氧化锰 【答案】B 【解析】试题分析:A 选项是正确的叙述,因为溶液稀释前后溶质的质量不变;B 选项是错误的叙述,因为溶液的质量不确定,故溶质的质量不一定相等;C 选项是正确的叙述,因为开始时溶液显碱性,当盐酸过量时溶液显酸性;D 选项是正确的叙述,加入二氧化锰反应的速率加快双氧水首先反应完;故选B考点:溶液的稀释、溶解度曲线、酸碱中和、实验室制取氧气7.蛋糕是青少年爱吃的食物,已知蛋糕中的油脂含有反式脂肪酸,化学式为C 18H 34O 2,下列说法正确的是( )A .反式脂肪酸不是有机物B .反式脂肪酸由碳、氢、氧三种元素组成C .反式脂肪酸由54个原子构成D .反式脂肪酸中碳、氧元素的质量比是9:1 【答案】B 【解析】试题分析:A 、反式脂肪酸不是有机物是错误的叙述,含有碳元素属于有机物;B 选项反式脂肪酸由碳、氢、氧三种元素组成是正确的叙述;C 选项反式脂肪酸由54个原子构成是错误的叙述,1个反式脂肪酸分子由54个原子构成;D 选项反式脂肪酸中碳、氧元素的质量比是9:1是错误的叙述,反式脂肪酸中碳、氧元素的质量比是19:1 ;故选B考点:有关相对分子质量的计算8.已知某反映的微观示意图如下,下列说法正确的是( )A .该反应不符合质量守恒定律B .参加反应的分子个数比是5:2C .该反应中反应物都是化合物D .该反应前后的分子种类改变 【答案】D 【解析】试题分析:A 、该反应不符合质量守恒定律是错误的叙述,任何化学反应都是用于质量守恒定律;B 选项是错误的叙述,参加反应的分子个数比是1:1;C 选项该反应中反应物都是化合物是错误的叙述,反应物中有一种物质是单质;D 选项该反应前后的分子种类改变是正确的叙述,故选D 考点:化学反应微观示意图 9.下列说法正确的是( )A .用水区别NaOH 、Na 2CO 3 两种固体B .除去NaCl 中的Ca 2+和SO 42-,可以先加入过量的Na 2CO 3,再加入过量的BaCl 2 C .用稀硫酸除去Ca(OH)2中的CaCO 3 D .可以用点燃的方法除去CO 2中的CO 【答案】A 【解析】试题分析:A 、用水区别NaOH 、Na 2CO 3 两种固体是正确的叙述,氢氧化钠溶于水放热温度升高;B 选项除去NaCl 中的Ca 2+和SO 42-,可以先加入过量的Na 2CO 3,再加入过量的BaCl 2是错误的叙述,引进新杂质氯化钡;C 选项用稀硫酸除去Ca(OH)2中的CaCO 3 是错误的叙述;硫酸能与氢氧化钙;D 选项可以用点燃的方法除去CO 2中的CO 是错误的叙述,一氧化碳在二氧化碳中不能燃烧,故选A 考点:物质的除杂10.2014年4月,中石油管道泄漏导致兰州自来水苯严重超标,2013年镉危机也敲响了土壤污染警钟,以下说法正确的是( ) A .工业废弃物排放不会造成土壤污染 B .我国水资源总量居世界前列,但人均不足 C .深圳淡水资源充足D .南水北调工程可以解决我国水资源时间分布不均的问题 【答案】B 【解析】试题分析:A 选项工业废弃物排放不会造成土壤污染是错误的叙述,应为工业废弃物排放会造成土壤污染和水污染B 选项我国水资源总量居世界前列,但人均不足是正确的叙试卷第4页,总7页述;C 选项深圳淡水资源充足是错误的叙述;D 选项南水北调工程可以解决我国水资源时间分布不均的问题是错误的叙述,应为南水北调工程可以解决我国水资源水资源分布不均的问题;故选B 考点:水资源问题第II 卷(非选择题)请点击修改第II 卷的文字说明 二、选择填充题11.下列说法正确的是() A. 均一稳定的液体一定是溶液B. 检测酒驾的重铬酸钾(K 2Cr 2O 7)中铬元素的化合价为+7价C. 硫在氧气中燃烧产生明亮的蓝紫色火焰D. 厨房发生燃气泄漏应马上开灯检查 【答案】C【解析】试题分析:A 选项是错误的叙述,应改为均一稳定的混合物一定是溶液;B 选项是错误的叙述,表述为检测酒驾的重铬酸钾(K 2Cr 2O 7)中铬元素的化合价为+6价 ;C 选项硫在氧气中燃烧产生明亮的蓝紫色火焰是正确的叙述;D 选项是错误的叙述,开灯检验容易引起爆炸;故选C考点:溶液的确定、化合价的计算、硫在空气中的燃烧现象、安全知识 三、推断题12.A~H 和X 都是初中化学中常见物质,期中AD 是无色气体,BE 是红色固体,F 为白色沉淀,H 为红褐色沉淀,她们的转化关系如图所示(1)写出化学式:A__ ___ ,H_ ,X__ ______(2)写出反应③的方程式:(3)写出反应④的方程式: ,该反应的反应类型是 。
深圳市2014年初中毕业考试数学模拟试卷(1)及答案解析

绝密级(解密时间2013年5月1日上午9点)2014年初中毕业考试数学模拟试卷说明:1.答题前,请将姓名、考生号、考场、试室号和座位号用规定的笔写在答题卡指定的位置上,将条形码粘贴好。
2.全卷分二部分,第一部分为选择题,第二部分为非选择题,共4页。
考试时间90分钟,满分1 00分。
3.本卷试题,考生必须在答题卡上按规定作答;凡在试卷、草稿纸上作答的,其答案一律无效。
答题卡必须保持清洁,不能折叠。
4.本卷选择题1-12,每小题选出答案后,用2B铅笔将答题卡选择题答题区内对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案;非选择题13-23,答案(含作辅助线)必须用规定的笔,按作答题目序号,写在答题卡非选择题答题区内。
5.考试结束,请将本试卷和答题卡一并交回。
第一部分选择题一、(本部分共12小题,每小题3分共36分.每小题4个选项,其中只有一个是正确的)1. -2的绝对值等于【】A.2 B.-2 C.12D.±22. 长城总长约为6700010米,用科学记数法表示是(保留两个有效数字)【】A、6.7×105米B、6.7×106米C、6.7×107米D、6.7×108米3. 下列交通标志图案是轴对称图形的是【】A.B.C.D.4. 下列计算正确的是【】A.a3a2=a6B.a2+a4=2a2C.(a3)2=a6D.(3a)2=a65. 在公式I=UR中,当电压U一定时,电流I与电阻R之间的函数关系可用图象大致表示为【】A. B.C.D.6.如图,从热气球C处测得地面A、B两点的俯角分别为30°、45°,如果此时热气球C 处的高度CD为100米,点A、D、B在同一直线上,则AB两点煌距离是【】A.200米 B.2003米 C.2203米 D.100(3+1)米7. 如图,在矩形ABCD中,AB=2,BC=3,点E、F、G、H分别在矩形ABCD的各边上,EF∥HG,EH∥FG,则四边形EFGH的周长是【】A.10 B.13 C.210 D.2138. 如图,射线OA、BA分别表示甲、乙两人骑自行车运动过程的一次函数的图象,图中s、t分别表示行驶距离和时间,则这两人骑自行车的速度相差▲ km/h。
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一、选择填空(20分)i 从下面每小题的A, B,C, D四个选项中选出可以替换划线部分的最佳选项(共5小题,每题1分)1.Our teacher told us to watch the experiment more closely.A luckilyB carefullyC widelyD excitedly2.Look! The two cats are running around and fighting with each other.A here and thereB farther and fartherC more or lessD quickly or slowly3.The students had to clean up the hall after the evening party.A make ---dryB make ---cleanC make --- perfectD make ---beautiful4.We should think of some better methods to solve pollution problems.A play withB talk withC deal withD work with5.The boy felt on top of the world when he knew he won first prize in the competition.A very angryB very happyC very amazedD very disappointedii 从下面每小题的A,B, C, D 四个选项中选出可以填入空白处的最佳选项(共15小题,每小题1分)6.--The MP5 player is very useful while you learn _________ English.-- I agree. I have decided to buy _________ MP5 player.A /, anB a; aC an; anD the ; a7.--_________ will you stay in that city?--_________ .A How long , For ten days.B How soon, In ten daysC How far, Ten days‟ walkD How often; Once a day8.--I heard they went skiing in the mountains las t winter.-- It _________ be true because there was _________ snow there last year.A would‟t ; fewB couldn‟t … littleC shouldn‟t ; a fewD mustn‟t ; a little9.I can‟t _________ Maria from here twin sister Jane.--Well, that‟s easy. Maria is _________ of the two.A tell ; thinnerB save ; thinnestC tell, the thinnerD save, the thinnest10.--Peter, where does Miss Li live?-- She lives in a _________ building, and she lives on the _________ floor.A forty floors, fortyB forty-floor, forty B forty floors, fortieth D forty-floor, fortieth11.--The Chef, the Actor, the Scoundrel is _________ film. Would you like to see ti with me?-- Thank you very much , but I _________ it already.A so interesting, seeB so interesting a , have seenC such interesting, sawD such an interesting , had seen12.--What would you like to have , noodles _________ porridge?--_________. Just do as you like.A or, NeitherB or, EitherC and, NeitherD and, Either13.--I hear the old man wants to walk more easily by using this stick.-- Yeah. Let‟s try _________ best to make his dream _________.A my; come outB me; come upC us; come onD our; come true14.--He _________our school for two weeks.-- Well, two weeks _________ quite a long time. We should help him with his lessons.A has left, isB have left, areC has been away from, isD have been away from, are15.--Do you prefer tea _________ coffee?--Yes, I _________ coffee often, but now I have tea only.A with, used to havingB to, used to haveC or, am used to haveD and, am used to having16.--_________ great news it is! The little boy was found alive after the accident.--Yeah, the news is so _________.A What a, excitedB How a, excitedC What , excitingD How , exciting17.--She won‟t study English well _________ she changes her ways of studying.--But there are many different ways _________ us to study English well. Maybe this way is the best for her.A unless, forB unless, ofC if, toD if, for18.--Have the police caught the thief _________ stole some money from the woman last week?--Yes. He _________ yesterday.A that, caughtB whom, was caughtC who, was caughtD which , caught19.-- I found _________ hard to communicate with foreigners. What should I do ?--lose heart. Keep on listening to the English news and you‟ll improve your oral English.A it; NotB it, Don‟tC that, Won‟tD this , No20.--What did the teacher say just now?--She asked us _________.A how did we find the way to the museum.B what shall we do for the coming weekendC why Tom made so many mistakesD when are we going to plant trees二、完形填空I am a student in the Northwest School now. I am from Hong Kong. I have been here for three years. And I have taken a lot of interesting ____21_____.I like English classes best. My English _____22____ is very nice. She helps me a lot with my English essays. Every time I have questions about my essay, she will ___23______ me patiently and help to make the essays better. Now, I am very happy that I can write an essay well in English. It‟s fun and _____24____ to learn English in the Northwest School.Physics classes in the Northwest School are really _____25____ those in my old school. We can do a lot of ____26_____. For example, we build our own water rockets. We use empty coke bottles and use plastic fans to make a water rocket, ___27______ can fly very high. We learn about hins not only from books, but also from experience. That‟s why I _____28____ physics classes so much.I have also learned a lot of different skills in the ____29_____ classes. In world dancing, I have learned many different countries‟______30___.In photography, I have learned how to take photos. And the most important hing is thatI hae fun in art classes.21.A buses B photos C sports D classes22.A friend B doctor C teacher D neighbour23.A teach B persuade C influence D change24.A hard B boring C easy D wrong25. A pleased with B different for\m C famous for D interested in26.A tests B business C experiments D calculation27.A which B what C how D whom28.A dislike B live C miss D understand29.A maths B physics C photography D art30.A works B drawings C dances D songs三、阅读理解AMum hates. Dad forgets. Brothers and sisters never care.Friends lie. People laugh. Even your dog turns away.You feel lost. Nobody helps.You talk. Nobody listens.On Helpline: You talk, we listenWe listen to all you would like to share. It costs nothing to ask for help.Call 911911 anytime, from Monday to Sunday.Carefree Helpline cares for you, day and night.To talk face to face, please call 122133.31.What can we learn about Carefree Helpline?A They listen to people in troubleB They help homeless dogsC They collect money for people in need.D They mainly give advice to parents.32.What does “your dog turns away” mean in the reading ?A Your dog runs away from home.B Your dog does not care about you .C Your dog bites other people .D Your dog cannot find tis way home .33.When can people call Carefree Helpline?A Only on MondayB Only on SundayC Only on weekendsD Anytime, any day34.If you want to talk face to face with them, you can call _________.A 999999B 911911C 122133D 12212235.In which page of a newspaper can you most probably find the reading?A NewsB AdvertisementC BusinessD Science & HealthBFirefighter Regina Wilson works in Brooklyn, New York. A reporter is asking Regina questions about how she does her job.Reporter: How long have you been a firefighter?Wilson: Eight yearsReporter : How did you get started?Wilson: First, I had to take a lot of tests. Then, I went to firefighting school for 13 weeks. I learned how to put out fires and how to use equipment.Reporter: How do you stay safe on the job?Wilson : I wear special clothing called bunker gear. It helps keep me safe from fire. I also carry an oxygen tank and a mas . They help me to breathe in a smoke-filled building.Reporter: Are there any new tools that firefighters use?Wilson: We have a special camera that can see in the dark. It can find heat. That way, we can tell where a fire is located. Reporter: Do you save pets?Wilson: I recently helped save some kittens. They were hiding under the beds. Pets usually hide during a fire because they are scared.Reporter : Do you ever get afraid?Wilson: There is no time to be afraid . I think about what I have to do to put out the fire safely.Reporter: What do you like best about being a firefighter?Wilson: Helping people.36. What is this article mostly about?A What a firefighter does?B How a firefighter is trained.C What a firefighter wears.D How a firefighter helps animals.37.What did Regina Wilson do first to become a firefighter?A She saved some kittensB She used fire equipmentC she learned to put out firesD she took a lot of tests.38.Why does Regina Wilson say she dose not get afraid?A She has an oxygen tankB She enjoys her job too muchC She knows how to fight firesD She is too busy putting out fires39.What does Regina Wilson like most about being a firefighter?A Working outB Saving animalsC Helping peopleD Using equipment40.Why did the author most probably write this article?A To teach readers how to prevent fires .B To make readers want to be firefighters.C To give readers information about firefightersD To show readers how to use fire equipments .COn June 25, hundreds of people gathered outside the Library of Congress (美国国会图书馆),in Washington D. C. They were celebrating public libraries. For more than 100 years, libraries have played an important role in keeping Americans educated. But how are these book-filled buildings changing with the times? You may be surprised to find out.Benjamin Franklin founded America‟s first lending library in 1731 in Philadelphia. And the public library system was increased greatly in the late 1800‟s . Businessman Andrew Carnegie donated millions of dollars to help build free public libraries across the country. Between 1886 and 1919, Carnegie helped build 1679 new libraries!Carnegie believed that libraries could offer Americans many opportunities. He knew that the more libraries there were, the more people would have opportunities to read books, news and more. There are more public libraries in America than McDonald‟s now.The United States is home to 9225 public libraries. Today, the number of libraries continues to grow. Seven out of 10 public libraries offer free internet use. This can help many community members who can‟t go online at home. It can also help them to have the opportunity to find jobs online.Benjamin Franklin once said, “The doors of wisdom are never shut. ” As long as the doors of public libraries are open, his statement is most certainly true.41. On June 25, hundreds of people gathered outside the library of Congress _________.A to have a partyB to read booksC to found a lending libraryD to celebrate public libraries42.The underlined word “donated” means _______ in Chinese.A 捐赠B 赔偿C 损失D 支付43.According to the passage, people can go online for free in about _______ public libraries.A 9225B 6458C 1919D 167944.According to the passage, which of the following is not true?A We can see more public libraries than McDonald‟s in America.B. Lots of libraries in America were built with the help of Carnegie.C. Benjamin Franklin founded America‟s first public library in 1731.D. Libraries are important places where Americans can gain knowledge.45.The writer writes the passage to _______.A show us how to find jobs.B encourages us to read more books.C show us how great Benjamin Franklin wasD tell us something about America‟s libraries.DMy name is Chelsea Chowderhead. Chowder is a thick soup made with fish and vegetables. I was laughed at because of my last name as soon as I started school. So when my family moved to South Carolina, I was very happy. I asked my dad if I could change my name.Dad said, “You shouldn‟t change who you are. Let people get to know you first and your name later. When you meet someone new, ask them a good question-something you …re really interested in . Once people start talking about themselves, they don‟t judge you. ”Two days later I went to my new school. When I got to my classroom, a girl named Claire introduced herself. I found that Claire wore a pretty bracelet (手镯). I asked her where she got them. Her face lit up, and she explained that she made it herself on her birthday.By lunch, I had talked to lots of people. But I noticed there were two kids, twin brothers, who didn‟t seem to talk to anyone else but each other. I decided to have a try.So I sat beside them. “What‟s it like being a twin? ” I asked.The twins looked surprised. Then they both started talking.“No one has ever asked us that!” one said.“Most of the time it‟s good, ” the other said.Soon we were laughing and talking. One of them said:”I‟m Nicholas, and this is Nathaniel . What‟s your name? ”I took a deep breath and said, “I‟m Chelsea Chowderhead. ”“Chowder? Cool! Do you want to play basketball with us after school? ” Nathaniel asked.“I‟d love to, ” I said.That is how I learned to ask good questions and became friends with the twins.46. Why did the writer want to change his name?A Because he wanted to make more friends.B Because people often made fun of his name.C Because his name was difficult to remember.D Because he wanted to be famous in the new school.47.The writer‟s father advised him to ___________.A ask good questionsB be friendly to othersC move to a new schoolD share his interests with others48.How did Claire get the pretty bracelet?A She got it as a prize.B She made it by herselfC It was a birthday present.D She bought it on her birthday.49.When the twin brothers asked his name, the writer felt __________.A surprisedB angryC nervousD proud50 What‟s the best title for the passage?A How to introduce myselfB The story about my nameC The sad moment in my lifeD How to ask good questionsECarly heard the buzzer. “Relax,” she told herself. But the memory of Alex‟s accident came back. Carly knew that the same thing could happen to her.Now Alex was working hard to get well again. He had decided to be the town‟s best young skier once again. Although Alex seemed to have put the accident behind him, Carly relived it every time she thought about downhill skiing.“No time for fear,” Carly thought as she raced downhill. “What use is a team member who‟s afraid to ski?” She remembered what Coach Bennett had said a few days earlier. Since Alex‟s accident, Coach Bennett had been kind and understanding. He had asked Carly whether she would stay on the ski team. She had wanted to say yes, but instead she said, “I don‟t know. ”“You need to find out, ”Coach Bennett had said:”Tonya hasn‟t been feeling well. You‟ll race in Saturday‟s competition if she can‟t make it. ”When Carly had arrived at the race earlier this morning, she was told that Tonya was home with the flu. “Get your skis on and get warmed up, ” Coach Bennett said. “This is a good day for your first race. ”Carly had to agree. Her teammates had skied well. They actually had a chance to win--if Carly didn‟t let them down.Before she knew it, Carly had crossed the finish line. Her teammates rushed up to her. “Carly! That was amazing! ”said Brandi, captain of the team.Carly‟s team finished in second place. Carly was disappointed but thought she had skied well for her first race.51. The story takes place in _______.A a running raceB a skiing competitionC a skiing accidentD an Olympic event52.After his accident Alex _______.A wanted to ski againB was nervous about skiingC had to drop out of the teamD would never be able to ski again53.Paragraph 3 and 4 are mainly about _______.A Carly learning that she may have to race for TonyaB how Coach Bennett had been kind to CarlyC why Tonya had not been feeling wellD Carly remembering a conversation with her coach.54.Why did the other team members rush to Carly after she had finished skiing ?A They thought she had skied well.B Carly helped them win the competition.C They wanted her to choose to stay on the team.D Carly didn‟t know if she skied well enough55.What‟s the best title for this story?A A Good LessonB I Love SkiingC No Time for FearD Learning to Ski四、选择下列词汇完成下面对话A rulesB injuredC readingD savedE accidentF importantA : What are you doing, Peter?B: I‟m ______56______ Shenzhen Daily.A: Is there anything important in the newspaper?B: It says there was a terrible car _____57_______.A: Oh, such bad news. Was anyone hurt?B: Yes, 8 people including pedestrians (行人) and passengers were _______58_____!A: What a pity! Someone must break the traffic ____59________!B: That‟s right. It is _______60_____ to follow the traffic rules.A: Everyone should cherish (珍爱) their lives.B: Yeah, I agree with you.五、选择下列句子完成下面对话A How much does it cost?B It‟s prices are from 3500 to 5500 yuan.C I have to ask 900 yuan for the phone.D We have all kinds of mobile phones here .E Can I try it on?F The iPhone 5 is the most popular with the young people.G There is something wrong with my mobile phone.A: Good morning. What can I do for you?B: I want a mobile phone, but I don‟t know which one to buy.A: _____61_______ Which brand do you like best, an HTC, a Nokia or an iPhone 5?B: I know little about them. Which one sells best?A: Mm! ______62______B: How much is the iPhone5 ?A: ______63______B: Oh, they are too expensive. I want the one which is the newest but not too expensive. A: What about this one? It works well and is very cheap.B: _______64_____.A: 1000 yuanB: Is there any discount ? How about 800 yuan?A: _______65_____B: Ok, I‟ll take it.六、填空根据句子意思,用所给单词的适当形式填空(10分)66.Don‟t ____________ (worried). If you can‟t find your pencil, you can use one of mine.67.As we all know, May is the ____________ (five) month of a year.68.The film is quite funny. It‟s worth ____________ (watch).69.Your answer to this question is wrong. You‟d better ____________ (do) it again.70.Jack, as well as his classmates, often ____________(make) fun of others.71.Please keep your eyes ____________ (close) when you do eye exercises.72.Mary was disappointed ____________ (find) that her friend didn‟t attend the party.73.I‟ll return the book to Miss Yang as soon as she ____________ (come) back.74.The baby is sleeping. Could you please speak more ____________ (quiet)?75.The TV programme A Bite of China attracts millions of ____________ (China).。